I know I need an 8.2K ohm resistor but... I have found them in various watts.. ( 1/8 up thru 2 W...)what watt rating should I be looking for for I definitely need to do this mod.I have the transmitter and the deal extreme batteries have been shipped

I used Trustfire 2400mAh cells here as well, only I just used some hotmelt to stick them together and I have no bulging issues but it's a snug fit. I suspect the electrical tape is the issue in your case. Perhaps forgo the tape and just get some heat shrink from Radical RC. They carry the thin stuff meant for going over Lipo packs.

I switched to custom firmware (ER9X) so I was able to set my low battery alarm to a suitable setting for my trustfire pack. I did order one of the LiFePo4 packs mentioned, and it does fit the radio, but again... it's higher voltage than my 2x18650 pack and so the circuitry has to *waste* the extra voltage by shedding heat and heat is the sworn enemy of electronics, so I decided to stick with the diy pack. Fortunately a close friend was looking for a pack for his JR and so he took it off my hands.

As for using the main power connector, I don't, so I cannot answer your question..... I would not go ahead without doing some checking first, if I were you. I just yank the pack out and plug it into my lipo charger.

chrispaiva wrote:Can I use the main charging connector to charge this trustfire ?

There's a diode for reverse polarity protection in the +ve line between the charge socket and the battery connector.You'd need to remove that diode and replace with a link to use a lipo charger through the charge port.The diode would confuse the monitoring circuit of the lipo charger. It only conducts in one direction and drops the voltage by about 0.6V when it does conduct in the forward bias.Whether the 9X circuitry will tolerate being subject to the fluctuations of the charger output is another thing to consider.I don't know the answer to that one.

So the safe answer is: Charge from outside the Tx until you get confirmation that it would be safe to charge inside.At least the 18650s will charge quickly instead of overnight.